1. adj. A staple food, product, or activity is one that is basic and important in people's everyday lives.（食物、产品或活动）主要的，基本的
2. n.[C] Staple is also a noun.
3. n.[C] A staple is something that forms an important part of something else.主要部分;重要内容
4. n.[C] Staples are small pieces of bent wire that are used mainly for holding sheets of paper together firmly. You put the staples into the paper using a device called a stapler.订书钉
5. v. If you staple something, you fasten it to something else or fix it in place using staples.用订书钉订
